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Plastic chairs with high backs come in a variety of styles, such as the popular Adirondack style. Local hardware and furniture stores sometimes sell high-quality chairs of this style. Variety stores such as Fred's and Dollar General sell such chairs seasonally. Chairs can be purchased during winter months via the websites of major stores such as Wal-Mart.

Quality can vary widely between high-backed plastic chairs, so it is important to make sure the chair you buy has an appropriate weight limit. LL Bean sometimes sells chairs of this kind online, while Amazon.com has a large selection of plastic high-backed chairs. IKEA sells a wide selection of plastic chairs at affordable prices.

Surplus retailers such as Overstock.com and Big Lots sometimes sell chairs at deep discounts. In addition, retailers often use Craigslist.org to advertise when they have chairs available. Sears and restaurant supply companies carry heavy-duty high-backed plastic chairs. Sam's Club and Costco have several styles at any one time. Since selection varies considerably by season, comparing retailers before making a purchase is important.